Drive device for power supply of low power semiconductor laser device
A power drive and semiconductor technology, applied in the field of low power semiconductor laser power drive devices, can solve the problems of semiconductor lasers being susceptible to high temperature, driving laser diodes, and damage life, etc., and achieve high power conversion efficiency, light weight, and small size.
Inactive Publication Date: 2010-06-30
WUHAN LINGYUN PHOTOELECTRONICS SYST
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Problems solved by technology
However, the electrical properties of semiconductor lasers and semiconductor diodes are similar to those of constant current drive. The electrical characteristics are not substantially different from those of ordinary silicon diodes. However, due to the characteristics of large current and low voltage, it is difficult for ordinary driving power devices to drive laser diodes efficiently.
At the same time, semiconductor lasers are vulnerable to high temperature, static electricity (ESD), over-current and other factors and damage or shorten the life
Method used
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[0016] The low-power semiconductor laser power supply drive device referred to in the present invention, its specific implementation examples are combined with the attached figure 2 with attached image 3 Described as follows:
[0017] A low-power semiconductor laser power drive device, which includes a DC power supply (6), an analog PI regulator (7), a resistor (8), an adjustment tube (9) and a semiconductor laser diode (10), characterized in that the adjustment The tube (9) is composed of one or more PNP transistors, the emitter of the adjustment tube (9) is connected to the DC power supply (6), and the collector of the adjustment tube (9) is connected to the anode of the semiconductor laser diode (10) , the base of the adjustment tube (9) is connected to the output terminal of the analog PI regulator (7), the cathode of the semiconductor laser diode (10) is connected to one end of the resistor (8), and the other end of the resistor (8) is grounded; the analog PI The posi...
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The invention relates to a power drive device of a low-power semiconductor laser. The device comprises a power supply, a PI adjuster, an adjusting tube, a resistor and a semiconductor laser diode. The power drive device is characterized in that the adjusting tube is compounded by one or more PNP-type transistors; the emitting electrode and the collecting electrode of the adjusting tube are connected with the power supply and the anode of the semiconductor laser diode respectively; the base electrode of the adjusting tube is connected with the output end of the adjuster; the cathode of the semiconductor laser diode is connected with one end of the resistor; the other end of the resistor is earthed; and the in-phase input end and the anti-phase input end of the adjuster are connected with the power supply and the resistor respectively. The device has the advantages of novel conception, compact structure, small size, convenient mounting, light weight, no pollution, low cost, high conversion efficiency of the power supply, good controlling performance, easy industrialized batch production and the like, and can be widely used in occasions needing to provide a drive source for the semiconductor laser and in particular provide a drive power for the low-power semiconductor laser in the photoelectric field.
Description
technical field [0001] The invention relates to a power drive device, in particular to a low-power semiconductor laser power drive device. Background technique [0002] The main applications of linear power supplies are in applications that do not require high heat generation and efficiency, or require low cost and short design cycles. Linear power supplies are step-down, that is, the input voltage must be higher than the designed output voltage. Compared with linear power supply, switching power supply has higher efficiency and flexibility. Compared with the same output power, the heat sink of switching power supply is much smaller, but the cost of switching power supply is high, and it needs a long development cycle. Therefore, the linear power supply is especially suitable for driving power supply devices for low-power semiconductor lasers (below 10W). [0003] With the development of diode lasers, its application fields are becoming more and more extensive. However, t...
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IPC IPC(8): H01S5/042
Inventor 王锋林卿
Owner WUHAN LINGYUN PHOTOELECTRONICS SYST